Lower MPG due to replacing tires?
My wife and I have owned our Toyota Prius for over a year now. We have been averaging about 45-48MPG on a full tank of gas, with our local city driving. However, recently, we've only been getting about 38-42MPG. The only difference I can think of is, that we changed all four tires. We bought some new tires at Costco. The tires are all at the correct pressure. Can different tires really make a 5MPG difference? Thanks.
I don't think by changing the tires will make the 5MPG difference, although I might be asking if you have more items in your Prius, also I just had mine Prius service recently, and I notice the improvement of the fuel efficiency, plus, take your Prius for a long distance, high speed drive is good for it as well.
Yes, the tires make a THAT big of a difference. I did the same thing with my Prius. I did not want to replace the low-rolling resistance tires with the same so I opted for regular sedan tires. My MPGs dropped instantly. On the upside, the car handles much better as is no longer skittish on the freeway.
Search Toyota Prius Questions
Toyota Prius Experts